Use most polygon and spline based objects, Mograph generators, as well as basic particle emitters and X-Particles emitters (X-Particles 2.5 & 3 supported) to define the edges of your falloffs - all at the same time.

For controlling deformers and Mograph effectors

Find Super Source Falloff in your objects' falloff tab.

Get separate control over the inside and outside edges of your falloffs.

X-Particles emitters and Mograph generators aren't available in the demo.